The main objective of this research is to explore the possibility of flying an aircraft on Mars. The most challenging part is generating sufficient lift force in Mars' low-density, low-pressure, and low-temperature atmosphere, considering the effect of gusts and radiation. Other important considerations include scientific payloads, energy supply systems, take-off and landing methods, and the method of launch and deployment. A conceptual UAV design should be performed and its performance should be verified by CFD experiments.